Insulator for telegraph-wires.



No. 759,276,. PATENT-ED MAY 10, 1904. 0. HOBERT.

INSULATOR FOR TELEGRAPH WIRES.

APPLICATION FILED APR. 10. 1903. I N0 MODEL. 2 SHEETSSHEET 1 PATENTEDMAY 10, 1904.

C. HOBER T. INSULATOB. FOR TELEGRAPH WIRES.

APPLICATION TILED APR. 10. 1903.

2 SHEETS-SHEET 2 N0 MODEL.

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I UNITED STATES Patented May 10, 1904:.

PATENT ()EEIcE.

INSULATOR FOR TELEGRAPH-WIRES.

SPECIFICATION forming part of Letters Patent No. 759,276, dated May 10,1904. Application filed Lpril 10, 1908- Serial No. 151,969. (No model.)

To (ZZZ whom it may concern:

Be it known that I, CLAYTON HOBERT, a citizen of the United States,residing in the city of Philadelphia, county of Philadelphia, State ofPennsylvania, have invented certain new and useful Improvements inInsulators for Telegraph-Wires, of which the following is aspecification.

My invention relates to an improved insulating device fortelegraph-wires, the main object being to facilitate the satisfactoryfastening of the wires thereto, while at the same time providing asimple and economical device adapted to the varying conditions commonlymet with.

The invention is fully described in connection with the accompanyingdrawings, and the novel features are specifically pointed out in theclaims.

Figure 1 is a central longitudinal section showing a preferred form ofmy device applied to a supporting-peg. Fig. 2 is abottom view of thecap-section. Fig. 3 is an outer face view of the sleeve-section. Fig. 4is a sectional view taken on the line 4 at of Figs. 1 and 3. Fig. 5 isan enlarged view showing a wire clamped between the sections, one halfof said view showing both sections in full elevation and the other halfshowing the cap in central cross-section, as in Fig. 1.

A represents a supporting-peg upon which are mounted the sections B andC of my improved insulator. The main insulator-section B, as shown, isin the form of a sleeve, the bore of which is screw-threaded to engagethe screw-threaded portion of the peg A, to which it is thus adjustablysecured. The cap-section C also screws upon the peg A, being providedwith a screw-threaded recess d, adapted to engage the end portion of thepeg which projects beyond the sleeve-section B, and it is formed, asindicated, with a projecting circular flange or collar 0 on its meetingface f, adapted to inclose the outer end g of the sleeve section B whenscrewed down upon the latter, thereby covering the junction between thesections, as well as serving to clamp the interposed wire, ashereinafter described. This outer end 9 of the sleeve-section isprovided with one or more wire-receiving slots h extending across itsannular face to one side of the inserted peg A, so as to permit thepassing of a wire inserted in said slot clear of the peg. I preferablyprovide a series of these slots of differing sizes to suit various sizesof wire and all lying outside the plane of the peg A, as shown in Fig.3. The depth of each slot is increased, as shown, toward either endthereof, thus forming a central ridge c' of slightly less depth than theintended thickness of wire, while the depth at either end is increasedby about the depth of the collar 6 on the cap-section C. Thisconstruction provides for engaging each interposed wire at three pointsin clamping the same between the meeting faces of the sections B and C,the edge of the collar e pressing the wire down into the deepened endportions of the slots, and thereby forming a kink in the wire as the capis drawn down upon the sleeve.

The sleeve B may be turned upon the peg, so as to present the properslot for the particular wire to be secured thereto. The screwing down ofthe cap upon the inserted wire effectually clamps the latter to thesleeve-section and at the same time so covers and pro; tects the wire asto prevent the admission of rain or sleet between the sections, thejunction of which is entirely closed by the depending flange or collar0. The connection is equally simple and satisfactory for an end tie, theend of the wire being in such case returned through a parallel slot onthe opposite side of the peg. The construction may of course be readilymodified in detail without departing from my invention.

What I claim is 1. The herein-described insulator, comprising asupporting peg or pin and a relatively adjustable sleeve and cap, saidsleeve and cap being disconnected from each other and both mounted onsaid supporting peg or pin, said sleeve having a wire-receiving groovethe ends of which are of greater depth than the intermediate portionthereof and said intermediate portion of less depth than thewire, andsaid cap having a lower face which bears upon the projecting portion ofthe wire in said intermediate part and clamps the same at said pl ace,and also having a circumferential flange extending below the plane ofthe upper surface of said sleeve and inclosing the same, said flangeengaging the wire contiguous to the deeper end portions of said grooveand kinking and clamping the same at said place.

2. The herein-described insulator, comprising a threaded supporting pegor pin a sleeve having an opening extending through it, said openinghaving threaded walls to engage said pin and said sleeve having itsupper surface formed with a wire-receiving groove which extends acrossit and is inclined continuously in opposite directions outward anddownward from a place contiguous to the center of the diameter of thesleeve to the ends thereof, whereby said groove is shallower at itscenter than at its ends, the shallower portion of said groove being ofless depth than the wire adapted to it; and a cap threaded upon said pinabove the top of said sleeve, said cap having a dependingcircumferential flange which extends below the upper surface of saidsleeve and is disconnected from the same and bears upon and kinks thewire adjacent to the deepest part of said groove, said cap also havingits under surface arranged to bear upon the part of the wire in theintermediate shallower parts of said groove and serving thereby to clampsaid part upon the sleeve.

In testimony whereof I aflix my signature in the presence of twowitnesses.

CLAYTON I-IOBERT.

WVitnesses:

W. P. TAGGART, TIIos. SIIALLoRoss, Jr.

